Kiln drawing means



v. J. AzBE KILN DRAWING MEANS Filed April 21, 1941 3 Sheets-Sheet l wwww E w Nov. 3, 1942.,

v J. Azlal:

KILN DRAWING MEANS s sneaks-sheet 2 Filed April 21, 1941 Nov. 3, 1942. v. .1. AzBE KILN DRAWING MEANS Fi1e-d April 21, 1941 '5 sheets-sheet s n Patented Nov. 3, 1942 Application April 21, 1941, Serial No. 389,542

- 11 Claims.

This invention relates to kiln drawing means,

and with regard to certain more speciiic features,- to automatic draw apparatus for lime kilns and the like. p

Among the several objects of the invention may be noted the provision of an automatic draw apparatus for multi-sectioned, vertical lime kilns and the like by means of which uniform but independent ilow of material may be obtained in the various sections whereby better advantage may be taken of the more uniform but controlled heating afforded by this particular form of kiln; the provision of an automatic draw ofthe class described which will permit of independent control of draw from the respective section and control of combustion therein; the provision. of a draw of the class described which permits of simultaneous automatic or manual delivery of lime of diiierent characteristics from the respective kiln sections; the provision of improved take-off means for the material produced; and the provision of a draw of the class described which steadily produces a better lime product at much higher ers through which a plurality of streams of nished lime pass by gravity. It has been the prackiln capacities and eiiciencies with lower draft requirements and less deterioration.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application of which will beindicated in the following claims.

In the-accompanying drawings, in which is illustrated one of various possible embodiments of the invention:

Fig. 1 is a sectional plan View of the apparatus in position below a multi-sectioned kiln being taken on line I-I of Fig. 3;

Fig. 2 is a vertical longitudinal section taken on line 2 2 of Fig. l;

3 is a vertical longitudinal on line 3-3 of Fig. 1;

Fig. 4 is a vertical cross section taken on line 4 4 of Fig. 3;

Fig. 5 is a verticalcross section taken on line 5-5 of Fig. 1;

Fig. 6 is a plan of the apparatus reduced in scale, being a section on line 6 -6 'of Fig. 7; and,

Fig. 'I is a front elevation of Fig. 6.

section taken Similar reference characters indicate corresponding parts throughout the several views of the drawings.` l

In my United States Patent 2,199,384 dated May 7, 1940, for calcining apparatus, is shown a -multi-sectioned kiln employing a center burner and having in its lower portion sectionalizedcooltice to draw the kilns of this and similar types intermittently by hand in order to hang the lime and permit trimming of the charge in the kiln. Automatic -draw means have not been used because (l) of impossibility of even heat distribution, unless structures are used such as shown in Patent 2,199,384, and (2) of lack of proper individual -mechanical draw controls, which among x' other things the present invention provides. Without individual control of the various streams of material some of the advantage of aimultisectioned kiln is lost. The present invention provides this control in an automatic system. v

Referring now more particularly to Fig. 1, there are shown at numerals four supporting columns for a vertical kiln. The lower portion of the kiln is shown in general at 3, including portions of independent sectional coolers 5, of which there are four, as indicated in Figs. 2 and 4. Through these independent cooling zones ilow streams of material as specied in said Patent 2,199,384. Suspended from the bottom of the kiln, between pairs of the columns I, is the automatic draw unit indicated generally at A. This consists of a built-up frame 1 in which are four independent chutes 9. These chutes 9 form continuations from the respective coolers 5. They are open in front as indicated at I I, having sloping backs Ill and sides 3|. These chutes 9 are spaced from the lower ends of the zones 5 as indicated at I3 (Figs. 3 and 4) to accommodate horizontal sliding control gates I5. The primary f purpose of the'se gates is effectively to block the ingress of air when the kiln is on a dead bank. The gates I5 are separably adjustable, each being provided with a threaded stem I1 on 4which is threaded a, hand control wheel I9. Each wheel I9 may be rotated but may not move endwise vbecause of a flange 2| thereon rotary in a vgroove 23. The grooves 23 are formed in stationary parts connected with the frame as` indicated at 25. By this means, each gate I 5 is independentlyadjustable from its respective wheel I9 to be moved into closed or partially open positions with respect to the outlets at the bottom of the cooling sections 5, respectively.

At 21 are shown reciprocating shakers con y guide the sides 29. The wheels 33 are supported upon shafts 31 carried in the frame 1.

Reciprocation of each shaker 29 is accomplished as follows:

Lateral guides 39 are provided on the frame for cross-head rollers 4|. Foreach pair of shakers e 29 is provided a pair of the rollers 4|. Each pair of rollers 4| supports a cross head 43. Each cross head carries endwise studs 43..

The studs 43 of one cross head (the rearmost one. to the left in Fig. 6) are pivoted to the ends of drag links 41. The other end of each drag link is pivoted to the other pair of studs 43 on the other cross-head 43. 'Ihese latter studs are respectively pivoted to connecting rods 3| The connecting rods 3| at their forward ends are provided with eccentric straps 33 passing around eccentrics 33 which are amxed to a power shaft e 31. The power shaft passes laterally to and through an outboard bearing 39, and beyond car-v ries a sprocket 3|. Sprocket 91| is driven from a gear reduction box 33 by means of a chain 33. The box 33 is powered through a chain drive 31 from a driving motor 39. From the above it will be seen that rotation of the drive shaft 31 results in reciprocation of both cross heads 43 with their rollers 4| in guides 39.

one cross head 43 is used for reciprocating twov the respective cross heads 43 and the shakers 29.

In Fig. 1 the two-right-hand and the upper lefthand shakers are shown without lost-motion, so that they receive all of the motions of their respective cross heads; whereas the abutment 19 at the' lower left is adjusted so that its respective shaker receives little motion. By this means, the stroke of the reciprocating shaking motion of each shaker may be controlled independently from its respectively adjustable abutment 19, although allshakers are operated from a common reciprocating mechanism having a fixed stroke.

In some cases it may be desirable to cut off the automatic draw for one or more sections, and effect a release by hand, but it is not desirable at the same time that the operation of other automatic draw gates be interfered with. In order to provide for this, each shaker 9 has resting upon its flanges 33 a sliding, bottom-forming gate 8|. Each gate 8| is provided on its lower side with a pair of racks 33 fastened at two points 33. This two-point attachment provides a clearance 31 between the respective racks and plate, for accommodating an endwise brace. which extends between the supporting flanges 33.

Each pair of racks 33 meshes with a pair of pinions 9|. Two independently movable pinions4 and two racks are used for each gate 3| as indicated in Fig. 4. Each pair of pinions 9| for a given gate 3| is carried upon an independent control shaft 93 which extends outward for control irom a hand wheel 93. Each hand wheel 93, along with its shaft 93, is movable axially, so that the respective pairs of pinions 9| may be thrown out of engagement with theirrespective pairs of racks 33. At |33 are shown hold-down guides for the racks.

When the pinions are disconnected. the gates 3| in their closed positions move with the shakers 29. In order that the gates 3| may positively move with the shakers 29 when closed. stop pins, such as shown at 91, are employed, which are ro- Itary atg99 on .the respective shakers and have' flngersii which extend through aligned openings through the gates`3| and a portion on the respective shakers 29. A

Should it -be desired to hand draw a given section 3, it is only necessary, after releasing pins 91, to engage the respective pairs of pinions 9| with the respective pairs of racks 33 on the respective shaker 29 and open the respective Igate This permits material to move directly through the resulting open bottom of the shaker.

'Ihis may Ibe done in the old way manually without benefit of any substantial shaking action from the respective shaker.

In order to receive material which is drawn out fromthe kiln, a track |03 is provided betweenv the supports I,v upon which is a car |93 having four separate compartments |91, each respectively under a section 3 when the car is in proper position below the kiln. Each ysection or compartment |01 of the car receives material from the respective section of the kiln under which it is located, and thus the different types of material which are available from the different sections, according to the controls exercised. is kept separate from the material in other parts of the car.

Operation is as follows: 'I'he shaft 31 is driven from the motor 39 through the chain drive 31, reduction` gear box 93. and chain 93. This rotates the eccentrlcs 33, which through the connecting rods 3| located on opposite sides of the apparatus reciprocates the pair of cross heads 43, the cross heads being connected by the links 41.

Any desired degree of reciprocating motion (or stroke) of any respective shaker 29 may be obtained by adjusting the lost-motion with the cross head which drives that shaker. With no 10stmotion, the shaker partakes of motion having a stroke equal to twice the eccentricity of the eccentric 33. If the lost-motion equals twice the eccentricity of the eccentric, then the respective shaker does not move at all, which is a desired limiting possibility of operation.

Under shaking conditions, the gates 9| of the respective shakers 29 are presumed to be shut so that the material falls out over the ends of the gates, as indicated by the arrow at the right in Fig. 3, this material flowing from the openings of the open chutes 9 which extend into the trough-like or channel-shaped or U-shaped shakers 29.

Any time that it is desired to open a gate 3|, the respective shaft 93 is pulled sidewise by means of its respective wheel 93, thus engaging the respective pinions 9|, as indicated in Fig. 4. 'Ihen by turning the respective wheel 93, the respective gate 3| may be adjusted to open position toeffect a manual draw. It should be understod that the intended speed of drive shaft 31 is about one R. P'. M., so that it is possible to open the pin connections 91 while shaking is proceeding and the desired engagement between the pinions 9| and the racks 33 may be made during motion as well as the opening adjustment upon the respective gate 3|. Thus it may be seen that independent manual draw may be accomplished on one or more of the outlets 3 while one or more of the remaining outlets are being automatically drawn.

The gates I in addition to shutting off air wheny the kiln is shut down may also be used in a measure to regulate the ilow of material, since if a gate is closely slightly there will be less material coming down along the side lof the kiln above the closed portion of the gate. More material will then come down along the open side of the kiln. If desired, ilxed plates may be inserted 'in the guides i3 so as predeterminately to' regulate downward iiow. In such cases, each gate would close against the edge of its xed plate, thus to obtain a more centralized ow from the outlet under conditions of partial closure.4

chutes from the outlets, a reciprocating shaker below each chute, a single mechanism for reciprocating all shakers, a lost-motion connection between said mechanism and each respective shaker, manually openable bottoms in the respective shakers, and independently operable manual means for respectively opening said bottoms while said ated.

7. Automatic draw means for kilns and the like having a plurality of outlets, comprising open chutes from the outlets, a reciprocating shaker below each chute, a single mechanism for reciprocating all shakers, a lost-motion connection between said mechanism and each respective shakers are automatically opershaker, manually openable bottoms in the respective shakers, independently operable manual means for respectively opening said bottoms While said shakers are automatically operated, and independently manually operable gates between the respective outlets and said chutes.

8. Automatic draw means for lime kilns and the like comprising an open chute extending from the kiln, a shaker adjacent to said chute and having an open end over which material may be shaken from the open chute, lost-motion driving driving the shaker, an openable bottom lin the c shaker, and means for manually opening said bottom.

2. Draw means for kilns and the like comprising an open chute from the kiln, a shaker reciprocatlng under the chute, reciprocating means for driving the shaker, an -openable bottom in the shaker, means'for manually opening sald'bottom while the shaker is automatically reciprocated, and an independently operable control gate between the outlet of the kiln and said chute.

3. Draw means for kilns and the like comprising an open chute from the kiln, a shaker reciprocating under the chute, reciprocating means for driving the shaker, a lost-motion connection between said reciprocating means and the shaker, an openable bottom in the shaker.

means for the shaker, said lost-motion connection comprising a cross head, a sliding extension from the shaker passing through said cross head, an

adjustable abutment on said extension, a sliding y bottom in said shaker, a rack attached to said bottom, a manually operable pinion for moving said rack, and manually operable means for connecting and disconnecting said pinion from the rack.

, 9. Draw means for kilns with multiple outlets, comprising automatic shaker means for the respective outlets, means for independently adjusting the operation of the respective shaker means for di'erent rates of draw, and manual means for independently drawing any given outlet durand means for manually opening said bottom while the shaker is automatically rec'iprocated l through said connection.

adjustable lost-motion connection between said reciprocating means and the shaker, an openable bottom in the shaker, and means for manually opening said bottom while the shaker is automatically reciprocated.

5. Draw means for kilns and the like comprising an open chute from the outlet of the kiln, a shaker reciprocating under the chute, reciprocating means for driving the shaker, an adiustable lost-motion connection between said reciprocating means and the shaker, an openable bottom in the shaker, means for manually opening said bottom while the shaker is automatically reciprocated, and an independently operable control gate between the outlet oi'. the kiln and said chute. y

6. Automatic draw means for kilns and the like having a plurality oi' outlets, comprising opening automatic drawing of one or more of the remainder comprising an opening in each shaker means, a cover for each opening and means for maintaining each cover closed during automatic shaking or to open it for manual drawing therethrough while the other shaker means are operative.

1o. Draw means for kilns with muiupie outlets, comprising automatic shakers below the respective outlets, openable bottoms in said shakers, means for independently adjusting the operation oi' the respective shakers for different rates of draw from said outlets respectively, and independently operable manual means for opening said bottoms whereby a respective shaker with open bottom ceases to shake out from the respective opening whereby the kiln parts connected with that opening may be independently drawn through said bottom.

11. Draw' means for kilns with' multiple voutlets, comprising automatic shakers below the respective outlets, openable bottoms in said shakers, and means for opening said bottoms whereby the respective shaker with open bottom ceases to shake out from the respective opening so that the kiln parts connected with that openingmay be independently drawn through said bottom.

' VICTOR J. AZBE. 

